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BaseValidator.ValidationGroup Property

Gets or sets the name of the validation group to which this validation control belongs.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public virtual string ValidationGroup { get; set; }
<asp:BaseValidator ValidationGroup="String" />

Property Value

Type: System.String
The name of the validation group to which this validation control belongs. The default is an empty string (""), which indicates that this property is not set.

ASP.NET provides many controls that have the ability to post back to the server. When one of these controls has its CausesValidation property set to true, validation is performed when the control posts back to server. The following controls have the ability to post back to the server:


Some of these controls post back to the server only when the AutoPostBack property is set to true.

These controls each have a ValidationGroup property that, when set, validates only the validation controls within the specified group when the control triggers a post back to the server. Use the ValidationGroup property to assign a validation control to a validation group. The Page class also exposes a GetValidators method and a Validate method that accept a ValidationGroup input parameter.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins.

Walkthrough: Validating User Input in a Web Forms PageBuilding ASP .NET Web Applications in Visual Studio

The following code example demonstrates how to use the ValidationGroup property to assign a validation control to a group.

Security noteSecurity Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<html xmlns="" >
  <head runat="server">
    <title>BaseValidator ValidationGroup Example</title>
    <form id="form1" runat="server">

      <h3>BaseValidator ValidationGroup Example</h3>

      Please enter your name:<br/>
      <asp:textbox id="NameTextBox" 

      <asp:requiredfieldvalidator id="NameTextBoxRequiredValidator" 
        text="Please enter your name."

      <br /><br />

      <asp:button id="SubmitButton"


      Please enter a search topic:<br/>
      <asp:textbox id="SearchTextBox" 

      <asp:requiredfieldvalidator id="SearchTextBoxRequiredValidator" 
        text="Please enter a topic."

      <br /><br />

      <asp:button id="SearchButton"


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.